Rib hook



,May 4 ,1926. 1,583,435

J. ANDREWS v RIB HOOK Original File May 10. .1924

Y INVENTOR A TTORNEY Patented lt/lay 4, 1926.

UN-IT-E-D" sures JOHN nn'nitnws, or ,NoKomIs, ILLINOIS.

BIB HOOK.

Application filed May 10, 1924, Serial No. 712,491. Renewed March 19, 1926.

to be used for anchoring coal cutting machines and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a rib hook of simple and durable structure adapted to be inserted in a hole in a wall of coal and to which the coal cutting machine may be connected by cable whereby the said machine is held in position for carrying on the cutting operation.

At the present time a straight rib hook is used in conjunction with a wedge for holding the coal cutter. This hook is driven into the wall of coal and it frequently shatters the coal and when this occurs a new hole must be drilled in the coal. .When it is desired to remove this hook from the coal it must be driven out and this operation consumes time and requires additional labor.

In the present instance the rib hook. comprises an intermediate wedge shaped mem-' her having a longitudinally disposed slot with channels at the opposite sides of the member and which communicate with the slot. Blocks are located at the sides of the wedge shaped member and are provided with lugs which are adapted to move in the channels and enter the slot. The said blocks are provided at their outer side surfaces with transversely disposed ribs. This structure is inserted in the wall of coal and the cutting machine is connected with the intermediate wedge shaped member. When the pulling strain is exerted upon the wedge shaped member itris moved between the blocks whereby the blocks are forced into close contact with the sides of the hole and the hook is thusheld in place in the wall of coal. WVhen it is desired to remove the rib hook the chain or rope from the cutting machine is loosened and the intermediate wedge shaped member is struck with a hammer or other implement whereby it is driven inwardly between the blocks and thus the blocks may disengage the sides'of the hole and the entire devicemay be readily removed from the hole in the wall of coal.

means of a rope orhole which is drilled in the permits the blocks to disengagethe sides o A rivet is secured at its ends to the blocks and passes transversely through the slot of the wedge shape member whereby the parts are held together. In the accompanying drawing F gure l is a plan view of the rib hook. Figure 2 is a side view of the intermediate wedge shape member of the rib hook. I Figure 3 is a side view of one ofthe blocks. i I

Figure 4 is a transverse sectional view of the rib hook. i

The rib hook structure includes a member 1 which is wedge shaped at one end as at 2 and which is provided at its opposite end w th a hook The member'l is provided with a longitudinallydisposed slot 4 and channels 5 are provided at the sides of the wedge shape portion 2 and communicate with the slot 4:.

The hook structure also includes blocks 6 which are adapted tobear against the sides of the member 1. The blocks are provided upon their exterior surfaces with transversely disposed ribs 7 which are adapted to engage the walls of the hole in the coal which are received in the channels 5 of the rare-NT orrlce.

when the device is applied. The blocksare provided at their inner sides with lugs 8 member 1 and which may enter the slot 4:

thereof.

A rivetpin 9 is secured at its ends to the block 6 and the said rivet, passes transversely through the slot 4 of the member 1. Therefore the parts are held together, but the member 1 may have longitudinal movement with relation to the blocks when the device a is in position in the wall and the coal cutter is connected with the member 1. The blocks 6 are tapered slightly from endto end and their larger ends are disposed at the outer end of the hole when the device is positioned in the wall and hence the said blocks also serve as wedges.

, To assemble the device in the wall the strucgiven a'blow in an lnward direction, this the hole and the device maybe readily removed therefrom. V

Having described the invention What is adapted to move in the channels and slot of claimed is the Wedge shaped member, and a rivet se- A rib hook comprising a wedge shaped cured to the blocks and passing transversely 10 member having a longitudinally disposed through the slot. slot and provided at its opposite sides with In testimony whereof I atfix my signature. channels, blocks adapted to bear against the sides of the said member and having lugs JOHN ANDREXVS. 

